My LBS is giving 20% back for what ever brand bike wins that days stage so if a Specialized bike wins todays stage. Purchase a Specialized bike and recieve a gift certificate worth 20% of the bike's purchase price.

How do I find out which bike won each stage, I am looking at getting a new bike

your lbs must carry a bunch of brands!

it's just a specialized deal right?

Yeah they carry quite a few brands and no it is not just Specialized, it goes for all bikes, Pinarello, Orbea, Kuota if they carry the brand that wins you get the deal

Stage 1: Pinarello (Valverde)
Stage 2: Look (Hushovd)
Stage 3: Time (Dumoulin)
Stage 4: Specialized (Schumacher)
Stage 5: Giant (Cavendish) [roll over with the mouse button down]

How do I find out which bike won each stage, I am looking at getting a new bike

You're going about it the wrong way.

FIRST figure out what different branded bikes (2 or 3) at the store you like.

NEXT go do a google search or company-site search of those brands to see which teams are using them.

and THEN figure out which of those teams have riders who could possibly win a stage.

FINALLY get ready to pay up on any given day one of those riders or teams wins.

Yeah they carry quite a few brands and no it is not just Specialized, it goes for all bikes, Pinarello, Orbea, Kuota if they carry the brand that wins you get the deal

holy cow! 20% off a pinarello? i'm gonna be in LA the second half of the race; tell me the name of your LBS and i'll drive down!

So, they still going to honor 20% off Scotts?

http://tour-de-france.velonews.com/article/80269/riccardo-ricco-tests-positive-saunier-duval-team-withdraws